Day Jr., R A <br/><br/>
Quantitative analysis / 
R. A. Day, Jr., A. L. Underwood. 
 - 6th ed. 
 - New Delhi:  Prentice Hall of India,  2003. 
 - xiii, 685p.; 25cm. 
<br/><br/><label>ISBN: </label>8120307933 
<br/><br/><label>Dewey Class. No.: </label>545 D27Q